PMID- 20484518 OWN - NLM STAT- MEDLINE DCOM- 20100720 LR - 20211020 IS - 1098-5514 (Electronic) IS - 0022-538X (Print) IS - 0022-538X (Linking) VI - 84 IP - 15 DP - 2010 Aug TI - Downregulation of robust acute type I interferon responses distinguishes nonpathogenic simian immunodeficiency virus (SIV) infection of natural hosts from pathogenic SIV infection of rhesus macaques. PG - 7886-91 LID - 10.1128/JVI.02612-09 [doi] AB - The mechanisms underlying the AIDS resistance of natural hosts for simian immunodeficiency virus (SIV) remain unknown. Recently, it was proposed that natural SIV hosts avoid disease because their plasmacytoid dendritic cells (pDCs) are intrinsically unable to produce alpha interferon (IFN-alpha) in response to SIV RNA stimulation. However, here we show that (i) acute SIV infections of natural hosts are associated with a rapid and robust type I IFN response in vivo, (ii) pDCs are the principal in vivo producers of IFN-alpha/beta at peak acute infection in lymphatic tissues, and (iii) natural SIV hosts downregulate these responses in early chronic infection. In contrast, persistently high type I IFN responses are observed during pathogenic SIV infection of rhesus macaques. FAU - Harris, Levelle D AU - Harris LD AD - Laboratory of Molecular Microbiology, NIAID, NIH, Bethesda, Maryland, USA. FAU - Tabb, Brian AU - Tabb B FAU - Sodora, Donald L AU - Sodora DL FAU - Paiardini, Mirko AU - Paiardini M FAU - Klatt, Nichole R AU - Klatt NR FAU - Douek, Daniel C AU - Douek DC FAU - Silvestri, Guido AU - Silvestri G FAU - Muller-Trutwin, Michaela AU - Muller-Trutwin M FAU - Vasile-Pandrea, Ivona AU - Vasile-Pandrea I FAU - Apetrei, Cristian AU - Apetrei C FAU - Hirsch, Vanessa AU - Hirsch V FAU - Lifson, Jeffrey AU - Lifson J FAU - Brenchley, Jason M AU - Brenchley JM FAU - Estes, Jacob D AU - Estes JD LA - eng GR - HHSN261200800001C/RC/CCR NIH HHS/United States GR - HHSN261200800001E/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20100519 PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Interferon Type I) SB - IM MH - Animals MH - Chlorocebus aethiops MH - Dendritic Cells/*immunology MH - Down-Regulation MH - Humans MH - Interferon Type I/*immunology MH - Macaca mulatta MH - Simian Acquired Immunodeficiency Syndrome/*immunology/*pathology/virology MH - Simian Immunodeficiency Virus/*immunology/*pathogenicity PMC - PMC2897601 EDAT- 2010/05/21 06:00 MHDA- 2010/07/21 06:00 PMCR- 2011/02/01 CRDT- 2010/05/21 06:00 PHST- 2010/05/21 06:00 [entrez] PHST- 2010/05/21 06:00 [pubmed] PHST- 2010/07/21 06:00 [medline] PHST- 2011/02/01 00:00 [pmc-release] AID - JVI.02612-09 [pii] AID - 2612-09 [pii] AID - 10.1128/JVI.02612-09 [doi] PST - ppublish SO - J Virol. 2010 Aug;84(15):7886-91. doi: 10.1128/JVI.02612-09. Epub 2010 May 19.